<template>
    <fieldset>
        <legend>tab切换</legend>
        <button v-for="btn in buttons" :key="btn" :class="['tab-button',{active:btn===selectBtn}]" @click="handleClick(btn)">{{btn}}</button>
        <div class="tab" :is="dynamic">123</div>
    </fieldset>
</template>
<script>
import emailCom from './email-com.vue'
import homeCom from './home-com.vue'
import mineCom from './mine-com.vue'
    export default{
        data(){
            return{ 
                buttons:['email','home','mine'],
                selectBtn:'email'
            }
        },
        computed:{
            dynamic(){
                return this.selectBtn+'-Com'
            }
        },
        methods:{
            handleClick(btn){
                console.log(btn)
                this.selectBtn= btn
            }
        },
        components:{
            emailCom:emailCom,
            homeCom:homeCom,
            mineCom:mineCom
       }
    }
</script>
<style>
    .tab-button {
        padding: 6px 10px;
        border-top-left-radius: 3px;
        border-top-right-radius: 3px;
        border: 1px solid #ccc;
        cursor: pointer;
        background: #f0f0f0;
        margin-bottom: -1px;
        margin-right: -1px;
    }

    .tab-button:hover {
        background: #e0e0e0;
    }

    .tab-button.active {
        background: hotpink;
    }

    .tab {
        border: 1px solid #ccc;
        padding: 10px;
    }
    h1 {
        margin:0;
    }
</style>